While there were no explicit reports of #thundersnow at any nearby observation sites, the @NOAASatellites #GOES16/#GOESEast #GLM instrument did detect a brief #lightning signature over the Chicago area at 1311 UTC (7:11 AM local time): cimss.ssec.wisc.edu/satellit… #ILwx

UW-Madison CIMSS

Climate Change Science on Telegram by @ClimateChangeScience
A @grttme project - Other backups: @Hallotme

1-minute Day Cloud Type RGB images from @NOAASatellites #GOES16/#GOESEast showed glaciated (brighter shades of green) cloud bands that produced snow squalls across parts of western/central #PAwx yesterday - with some lightning activity & #thundersnow: https://t.co/w2gogop8oy https://t.co/SbNQ7edRSw

UW-Madison CIMSS

Climate Change Science on Telegram by @ClimateChangeScience
A @grttme project - Other backups: @Hallotme

#GOESEast Infrared imagery with an overlay of #GLM Flash Extent Density showed brief flashes of #lightning, with Madison (KMSN) reporting #thundersnow: https://t.co/ZVetK1uMpL #WIwx @NWSMilwaukee https://t.co/GbcxnKxOcf

UW-Madison CIMSS

Climate Change Science on Telegram by @ClimateChangeScience
A @grttme project - Other backups: @Hallotme

As a lake effect band intensified over eastern Lake Erie and moved inland, 1-minute #GOESEast Infrared images with an overlay of GLM Flash Points showed evidence of likely #thundersnow activity in the vicinity of I-90 southwest of #Buffalo. #NYwx https://t.co/k7nRIgSIUl

UW-Madison CIMSS

Climate Change Science on Telegram by @ClimateChangeScience
A @grttme project - Other backups: @Hallotme